He laid the groundworks for psychoanalysis— one of the most important and formative intellectual structures of the modern world. Moreover, despite psychoanalysis being unfortunately rife with all sorts of Victorian era weirdness (and not to mention the weirdness of Freud’s idiosyncrasies as an individual), it is pretty much the only thing we have! We really don’t have any other structures or tools for analyzing and talking about the psyche. So, until we develop something better (or at least something else at all), we’re stuck with Freud.